The Pakistani Taliban has claimed responsibility for a suicide attack that killed 72 people at a popular park in Lahore on Easter Sunday, saying it had targeted Christians.

"We carried out the Lahore attack as Christians are our target," Ehsanullah Ehsan, spokesman for Taliban faction Jamaat-ul-Ahrar, told AFP by telephone on Monday, adding that the group would carry out more attacks in the future, including on schools and colleges.